Flashcards in Redox Deck (5)
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0
Q
Give the titration equation for Cr2O72- and Fe2+
A
Cr2O72- + 6Fe2+ + 14H+ = 2Cr3+ + 6Fe3+ + 7H2O
1
Q
Give the equation for Fe2+ and MnO4-
A
MnO4- + 8H+ + 5Fe2+ = Mn2+ + 4H2O + 5Fe3+
2
Q
What is the equivalency ratio for Cu2+ and thiosulphate (S2O32-) ions?
A
1 to 1
3
Q
What are the 4 steps in making balanced ion-electron half equations?
A
- Balance all atoms (except O and H)
- Balance O by adding water
- Balance H by adding H+ aq
- Balance the charge by adding e- to more positive side
4
Q
What are the equations for converting orange dichromate (VI) to yellow chromate (VI)?
Is it redox?
A
Cr2O72- + 2OH- = 2CrO42- + H2O
2CrO42- + 2H+ = Cr2O72- + H2O
NO!